RE: mail not sent outside to smart host

Hi Bill,

I created the entry in the hosts file that hard-links the IP-address to the
name of the ISP smarthost. I didn´t even have to reboot.
It worked immediately. I can now have the domain name in the "smarthost"
property-box of the smallbusiness SMTP connector.

However, of course this in itself is not a solution, because now we are
still dependent on a hard-coded ip-address.
So, I hope this information will tell you what to tell me to do next!

Creating a new SMTP-connector (after first deleting the old one) I tried
first, but that did not change the situation.

Thanks for your interest and advice.
With best regards,
Wolter kaper

""Bill Peng [MSFT]"" wrote:

Hi Wolter,

Thank you for posting back.

At this point, please try manually create an entry in hosts file to check
whether the problem persists. To do so, please refer to:

TCP/IP in Windows 2000 Professional
Configure Hosts File
http://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/prork/pr
cc_tcp_lesj.mspx

Please reboot the computer after you configure it, and then check whether
Smarthost is now working.

In addition, please try creating a new SMTP connector on the problematic
server, and see whether it is able to connect to the Smarthost via domain
name.

Thanks for your time and I look forward to your update.

Sincerely,

Bill Peng
Microsoft Online Partner Support

=====================================================
This newsgroup focuses on SBS technical issues. For issues regarding other
Microsoft products, please post in the newsgroup for that product:.
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx

When opening a new thread via the web interface, we recommend you check the
"Notify me of replies" box to receive e-mail notifications when there are
any updates to your thread. When responding to posts via your newsreader,
please "Reply to Group" so that others may learn and benefit from your
posting.

Microsoft engineers focus on one issue per thread. Although we may provide
additional information as a reference, we recommend posting separate
incidents in separate threads to keep the thread on topic. This will help
to ensure the issues are resolved in a timely manner.

For urgent issues contact Microsoft CSS directly. Please check
http://support.microsoft.com for regional support phone numbers.

Any input or comments in this thread are highly appreciated.
=====================================================

--------------------
Thread-Topic: mail not sent outside to smart host
thread-index: AcgJBgTyO6TEPH9+QBqd1j4nR2PgeA==
X-WBNR-Posting-Host: 207.46.19.197
From: =?Utf-8?B?V29sdGVyIEthcGVy?= <WolterKaper@xxxxxxxxxxxxxxxxxxxxxxxxx>
References: <2D5B1B6B-A573-42E2-B843-C48245D21DB6@xxxxxxxxxxxxx>
<530EJ574HHA.4200@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: mail not sent outside to smart host
Date: Sun, 7 Oct 2007 10:18:03 -0700
Lines: 162
Message-ID: <AACC3968-24DC-4F0A-9B2C-86A1072D0059@xxxxxxxxxxxxx>
MIME-Version: 1.0
Content-Type: text/plain;
charset="Utf-8"
Content-Transfer-Encoding: 7bit
X-Newsreader: Microsoft CDO for Windows 2000
Content-Class: urn:content-classes:message
Importance: normal
Priority: normal
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.2929
Newsgroups: microsoft.public.windows.server.sbs
Path: TK2MSFTNGHUB02.phx.gbl
Xref: TK2MSFTNGHUB02.phx.gbl microsoft.public.windows.server.sbs:67917
NNTP-Posting-Host: tk2msftsbfm01.phx.gbl 10.40.244.148
X-Tomcat-NG: microsoft.public.windows.server.sbs

Hi Bill,
As you see from my rhythm of posting I am a part-time network
administrator.

""Bill Peng [MSFT]"" wrote:


Hi Wolter,

Thank you for posting here.

Actually, you're now using a recommended way to configure Smart Host -
using its IP address rather than Domain Name. In doing so, it can avoid
problems caused by DNS.

I am glad to hear!

As you mentioned, your ISP may change the Smart Host's IP address, this
can
also cause DNS problems. If you want to change the configuration back to
Domain Name, please purge your SBS local cache for the original domain
name:

I like to change the configuration back, because the ISP changes the
active
server sometimes (as we saw from our smtp log)

1. Run "IPconfig /flushdns" command to purge DNS cache.
2. Open DNS console in Administrative Tools, right click your Server
Name,
and click "Clear Cache".

I did both.

After that, please use nslookup to check whether you're able to resolve
the
Domain Name to its correct IP address.

Yes, it resolves correctly (but that was OK already).
Still, the problem is there: Exchange can not send mail to this smart host
if I specify its FQDN in the "smart host" box. While he CAN send mail if I
specify the corresponding IP-address.
So Exchange can NOT do the resolution, while nslookup can.

It remains terribly strange. Any suggestions on this mystery are
appreciated!
Wolter

If you're not able to do so, contact
your ISP to make sure that their DNS Server has been replicated.

I hope the above info helps.

Sincerely,

Bill Peng
MCSE 2000, MCDBA, CCNP, CCDA
Microsoft CSS Online Newsgroup Support

Get Secure! - www.microsoft.com/security
=====================================================
The public newsgroup only focuses on SBS related technical issues, for
other Microsoft products, we recommend you to post to appropriate
newsgroup
to get most qualified responses.
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx

When opening a new thread via the web interface, we recommend you check
the
"Notify me of replies" box to receive notification. When responding to
posts via your newsreader, please "Reply to Group" so that others may
learn
and benefit from your issue.

Microsoft engineers can only focus on one issue per thread. Although we
provide other information for your reference, we recommend you post
different incidents in different threads to keep the thread clean. In
doing
so, it will ensure your issues are resolved in a timely manner.

For urgent issues, you may want to contact Microsoft PSS directly.
Please
check http://support.microsoft.com for regional support phone numbers.

Any input or comments in this thread are highly appreciated.
=====================================================
This posting is provided "AS IS" with no warranties, and confers no
rights.
--------------------
Thread-Topic: mail not sent outside to smart host
thread-index: AcfiTmmzjUWk9MSHS1O2yo6nUpu05A==
X-WBNR-Posting-Host: 207.46.193.207
From: =?Utf-8?B?V29sdGVyIEthcGVy?=
<WolterKaper@xxxxxxxxxxxxxxxxxxxxxxxxx>
Subject: mail not sent outside to smart host
Date: Sun, 19 Aug 2007 03:48:01 -0700
Lines: 53
Message-ID: <2D5B1B6B-A573-42E2-B843-C48245D21DB6@xxxxxxxxxxxxx>
MIME-Version: 1.0
Content-Type: text/plain;
charset="Utf-8"
Content-Transfer-Encoding: 7bit
X-Newsreader: Microsoft CDO for Windows 2000
Content-Class: urn:content-classes:message
Importance: normal
Priority: normal
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.2826
Newsgroups: microsoft.public.windows.server.sbs
Path: TK2MSFTNGHUB02.phx.gbl
Xref: TK2MSFTNGHUB02.phx.gbl microsoft.public.windows.server.sbs:57551
NNTP-Posting-Host: tk2msftsbfm01.phx.gbl 10.40.244.148
X-Tomcat-NG: microsoft.public.windows.server.sbs

Hi,

We have SBS2003 configured using the Internet Connection Wizard.
We receive email using the POP3 connector from our ISP.
We send mail NOT using DNS but to a smart host, "mailrelay.planet.nl",
given
to us by our ISP. This setup worked fine for over a year.

A week ago, some days after installing SP2, mail stopped going out and
senders immediately received this message:
"A configuration error in the e-mail system caused the message to
bounce
between two servers or between two recipients. Contact you
administrator"
<ourdomain.nl #5.3.5>
The same message (error 5.3.5) was also found in the logs under
"MSExchangeTransport".

I found these knowledge base articles: KB326304, KB555418, KB316617

Following KB326304, I checked the "SMTP-Connector for SmallBusiness"
that
was found in "First Organisation (Exchange)". I checked that the right
smart
host was mentioned there, by FQDN, and that the Exchange server was not
referring to itself.

Following KB555418, I checked the address space tab of this same "SMTP
connector for Smallbusiness". The address space should be "*", as
indeed
it
was.
Next I checked the "Default SMTP virtual server", Advanced delivery
tab:
Configure button. No internal or external DNS servers should be
configured
there. Indeed, the list of DNS-servers was empty.

I tried various changes, after each change, restarting the server.
Also, noting all changes and finally carefully restoring the original
state.

Finally, the following change succeeded in solving the problem. BUT it
is
an
ugly solution:
On the "SMTP connector for SmallBusiness Server" I changed the smart
host
FQDN ("mailrelay.planet.nl") into the corresponding ip-address, as
reported
by ping and by nslookup.
This solved it.
However, our ISP frequently changes the active machine, so the
ip-address
is
ever changing. So it's not a good solution.

Why is Exchange suddenly unable to lookup "mailrelay.planet.nl" in DNS?
When I type: nslookup mailrelay.planet.nl
then the DNS-service on the SBS server replies correctly and mentions
the
ip-address that currently works.
(Our DNS has been setup automatically by the SBS2003 installer, I
didn't
make changes to it).

Anybody had any problem like this?
Any suggestions or explanations appreciated!

With best regards,
Wolter Kaper






.